From what I gather, a USB-A to USB-C cable is included, but for direct USB-C to USB-C connections, a Type-C cable would need to be ordered separately.
For 4K Ultra-HD webcam capture and 1080p or 720p conferencing you'll want a fairly fast, modern Intel Mac with USB 3.0 ports running Mac OS Sierra or El Capitan 10.11 .
A handheld RF remote controls all camera, audio and call management functions.
Logitech's website implies this UVC compliant web camera and it's Camera Settings app is backward compatible with USB 2.0 ports, Mac OSX 10.8 at less-than-ultra resolutions and lower frame-rates.
A fast and big external Thunder Bolt or USB drive is probably wise if you're planning on extensive 4KHD capture.
It should be noted many Apple computers like the Mac mini and Mac Book Air often have much slower processors in the 1Ghz range, although Apple does support a 'Turbo' CPU up-clocking mode to temporarily ramp up the clock speed under demanding tasks when needed.
On lesser Mac's you might not reach or sustain maximum frame rates possible.
H.264 video compression is supported on the C922 (as with all premium model Logitech cameras like the C930e, Conference Cam Connect and Logitech Group.) This helps both frame rates and significantly reduces the size of the data stream or captured files saved to disk.